& Simulations

We analyze hydrodynamic systems to understand their behaviour. We study the influence of environmental and structural loads on the systems and present results in comprehensive analysis reports to support design, decision making, project feasibility and marine operations. Our aim is to ensure optimum workability while maintaining stringent safety requirements. Basically, it is about identifying the actual limits of the project and applying the necessary safety margins to achieve optimum workability.

Mooring Analysis In depth

Mocean core competence and how it all got started. Our foundation is premised on mooring innovations. We are involved in all aspects of mooring analysis & design. In addition to the more conventional mooring analysis & design activities, we've recently specialized in life-time extensions and mooring line failure detection projects. The changing market has enabled us to move into a more innovative & technically challenging direction. We hope to bring the mooring industry into the 21st century. In recent years, we have been involved in:

Mooring Analysis CALM

Mocean has been invlolved in a series of mooring analyses for CALM buoy mooring design projects. The design of the mooring, subsea hoses, floating hoses, hawser and buoy domensions are closely related. therefore we prefer to perform a fully-integrated design assessment. Our scopes for CALM buoy projects typically include:

Detailed OrcaFlex models are used to accurately assess the loads on the various components. These loads support the mooring configuration design, subsea hoses & PLEM and overall offloading terminal marine design

Mooring Analysis Ocean Cleanup

Mocean has contributed significantly to the design of TheOceanCleanUp plastic catching barrier in 4500m of water depth.
Since we have set out on this project together with TheOceanCleanUp team we have seen more innovations than we have in 10 years oil & gas projects. Analysing the motion behaviour and assessment of the station keeping requirements has proven a great challenge that is far from finalised. Nothing similar has ever been attempted and exactly this is what makes it such a great project for us. Our staff is overjoyed to be working on such absurd innovations.

In 3 years since we started working on this project we (TheOceanCleanUp and Mocean) have learned so much about the response of flexible systems in a marine environment. We hope to be able to bring this knowledge to use in again other applications.
Seeing how the overall plastic capturing capacity develops over time and finding out which of the uncertainties are the driver for better efficiency is what makes this project so dynamic.
"Mocean supplies us with very high quality engineering services, which helps us develop the largest offshore structure in history."
Boyan Slat, Founder, The Ocean Cleanup

Mooring Analysis Mooring Squalls

Design of a permanent CALM type mooring system for VLCC and ULCC floaters in an un-predictable squall environment. An OMEA 2016 paper (OMAE2016-54968) was presented in cooperation with our client, Shell Global Solutions, introducing to the industry the innovations that were developed in this challenging project, both in scale, practicality and theoretical background. The analysis resulted in a new proposed method for the industry for the analysis of squall governed sites.

OMAE2016-54968"Working on this project together with Shell’s best offshore and metocean engineers enabled us to shift the boundaries of knowledge in the industry!"

Mark

Mocean

Mooring Analysis Soft Yoke Mooring

For a Shallow water FSRU project, a mooring solution was to be validated against building a jetty & breakwater. The mooring solution proved to be much more cost effective. A complete Soft Yoke Mooring system was designed & model tested including all mechanical connections and materials. This was a challenging project that enabled us to bring all our assets in hydrodynamics, mechanical, structural and CAD drafting to the table.

Mocean staff holds 3 patents in the design of softyoke mooring systems and have been involved in the concept & basic design of 5 soft-yoke mooring systems

Heavy Lift Analyses

Mocean performs a wide range of lifting analyses for the Renewable, Civil and Oil&Gas industry. The majority of these projects are complex and require innovative solutions to enable the best performance. Our in-depth analytical approach using detailed time-domain simulations combined with a track record of practical project experience enables us to ensure the best project performance for our clients.

Heavy Lift Analyses Decommissioning Support

Motion analysis or the lifting and transport of the Horne & Wren Jacket decommissionig project. After a series of successful projects last year Scalddis SMC and Mocean teamed up again for the successful removal of the jacket from the Southern North Sea. The engineering and simulations provided the client a good workability and a swift approval of the operation by the MWS.
play video"Mocean supplied us with their full engineering support to be able to have the required Topside supports designed, certified and installed on time for a successful execution of the project." Arjan Dams | Operations Manager | SCALDIS NV

Heavy Lift Analyses GBS Installation Kriegersflak

For the installation of a set of concrete GBS structures we have been able to optimise and define the rigging, workability and project schedule.
The key in performing multi-boy dynamic analyses is the have a thorough understanding of the software capabilities of the tools in use. Especially the 3D diffraction analysis results require proper scrutinizing before using the results in the more generate time-domain analysis suite.
The current project was mainly challenging due to the very low water levels and very large shallow water effects as a result. The project was swiftly approved by the MWS and the analysis yielded a better than expected workability window.

Heavy Lift Analyses Heavy Lift Northergrund

Impact analysis of OSS installation by Scalids SMC for the Nordergründe OWF. Detailled model of guiding system was created, including energy absorption due to the hysteresis effect by bending of the rubber 'fingers' during contact. Inidvidual reaction force per bumper and the total horizontal impact force of guiding system onto the top flange of monopile was calculated for all critical phases of the operation.

""The OSS installation went really very well. The ‘fingers’ were part of a three - stage guiding system and Mocean calculated the impact forces on individual fingers and the total impact on the monopile top flange. The models realistically predicted the contact event of rubber fingers with the monopile which gave valuable insight in the working of the system. The simulation showed exactly what we experienced in real life.”
Bastian Biedermann | Project Manager OSS | WPD Offshore Solutions GmbH

Heavy Lift Analyses Heavy Lift Rampion

Detailed motion analaysis for the Rampion OWF Offshore Substation installed by Scaldis SMC. It enabled our client to achieve high workability and obtain swift MWS approval. Mutli-body hydrodynamics were incorporated (MOVIE LINK) to enhance the workability and obtain a proper understanding of the barge motions in the wake of the lift vessel.
Rampion OWF Offshore Substation installation by Scaldis SMC

Heavy Lift Analyses Multi Body Lift Analysis

For the installation of the supporting structures for the salvage of the Costa Concordia we performed the lifting and installation analysis. The crane vessel used a outboard pontoon connected to the vessel to gain roll-stability during the operations.
The proximity to the Costa Concordia and the complex wave patterns in the wake of the island posed a great challenge for the project.
Our analysis enables the client to receive a swift approval from the MWS and other authorities and also increased the workability that was originally set-out. The operation was executed with confidence and this resulted in a successful installation project.

Complex Motion Analysis Motion Analysis

As the name suggests, Mocean does motion studies. this is where we outperform our peers. Always capable to translate a complex situation into a clear and conclusive analysis results.

Complex Motion Analysis Gangway Analysis

Mocean has supported Kenz Figee with the (hydro-) dynamic analysis of their new compensated gangway system. The dynamic analysis was focussed at running large numbers of loadcases in a short time enabling a fast assessment of the system workability on a vessel of any potential client. In order to do so mocean has developed state-of-the-art spectral analysis toolbox which generates gangway capacity plots in seconds.
One of the key difficulties in compensated gangway operations are the difficult to detect vessel drift motions. The Kenz gangway overcomes this problem in a subtle and effective manner using a ‘feeler’ at the tip. The result is a system that is much more gentle towards the receiving platform than its peers.

Complex Motion Analysis Personnel Transfer - SeaSpyder

Mocean is central in the development of the fully motion commpensated personnel transfer system; the SeaSyder. The concept and basic engineering of this innovative and groundbreaking transfer system have been developped to enable platform owners to have full control of their personnel transfer and not be dependant on helicopters or vessels with compensated gangways.
A detailed model of the vessel, the personnel cabin, the winches and the control system of the electric drives has been analysed. Having a full time-domain model enables us to test the various settings of the state-space control system of the internal winches controlling the cabin motions.
The same models have been used to assess the safety cases, failing sensors or other unforeseen occurances that might result in a hazardous situation.
The operation of the seaspyder is fully passive and allows for transfers in up to 3.5m Hs.

Complex Motion Analysis Rock Dump

For a Dredging contractor an in-depth analysis was made of a Rockdump-Fallpipe system. The complete dynamics of the vessel, fallpipe support tower, fallpipe segments and ROV were included in a time-domain analysis model. This model has been ran for a wide range of environmental and operational cases enabling our team to clearly define for each loadcase the maximum workability of the system.
All together the analysis enabled our client to perform better than what the system was specified for.

Cable- & Pipe-lay Cable- & Pipe-lay

Mocean is one of the most versatile cable lay engineering company in Europe. We support our clients in every phase of the project with clear and concise engineering. During the past 4 years, we have been involved in more than 30 cable lay projects globally. Our activities typically include SURF/Cable lay dynamic analysis, deck-layout design support, feasibility studeis, complex operations and equipment specification (See OVERVIEWof our cable lay activities)

“Mocean supported us with detailed dynamic installation analyses at short notice, this enabled us to give prompt input to our client and operational team.”

Bart Ledoux

Lead Subsea Engineer

JanDeNul – Offshore Dept.

Cable- & Pipe-lay 2nd end pull-in

Mocean delivered an in-depth hydrodynamic analysis for the Inter Array Cable (IAC) and Export cable second end pull-in operation. We used physics, mathematics and physical models to proffer safe and cost effective solutions to the installation challenges encountered in the project, thereby optimizing workability. The results obtained from the analysis assisted our client with equipment selection and deck arrangement. The following stages of the second end pull-in operation were accurately modelled as a continuous operation in order to study the influence of environmental loads on the Cable and deck equipment.

CPS Overboarding via Quadrant and Cable Lay Vessel movement

CPS latching to Monopile bellmouth

Quadrant Overboarding and lowering to seabed

Final Cable pull-in to hang off point

"Working on this project was challenging and rewarding as we were able to develop tools, techniques and procedures aimed at eliminating inefficiencies associated with cable installation scopes".

Samuel Sanni

SURF-Cable Lay Department Manager

Mocean Offshore

Cable- & Pipe-lay Plastic Pipe (TCP) Pull-in

Mocean carried out an extensive hydrodynamic feasibility study for the pull-in of a Thermoplastic Composite Riser. The two thermoplastic risers are to replace existing steel risers. The risers are pulled through pre-installed I-tubes clamped to the jacket legs. Mocean performed installation and In-place analysis to determine the maximum displacement of the risers within the pre-installed clamps during the pull-in operation and during service. The results from the dynamic analysis are checked against the thermoplastic composite riser installation and operation allowable criteria. Mocean recommended the best installation procedure and operability limits for the operation.
"This project afforded Mocean the opportunity to assess the strength and installability of a new thermoplastic product and also establish installation limitations. The installation analysis results assited in proving the technology and our client was very pleased".
Samuel Sanni
SURF-Cable Lay Department Manager
Mocean Offshore

Cable- & Pipe-lay Stiff Joint Overboarding

Mocean performed detailed hydrodynamic analysis for the overboarding of a stiff joint comprising bend restrictor, bend stiffeners and submarine power cable. The stiff joint is overboarded with the aid of the vessel crane, a spreader bar and floating buoys. For a 24m long joint with limited chute radius, our proposed solution is to attach floaters to the overbend section of the cable catenary to ensure a smooth overboarding within the crane side lead and offlead angle limits, at the same time prevent MBR infringement. We were able to solve the identified installation challenges with this methodology.

SURF Analysis SURF General

Mocean has extensive experience in the analysis of flexibles in a marine environment.
With 6 OrcaFlex software licenses we can generate both in-depth analyses of complex situations while covering vast amounts of loadcases to ensure the most onerous case is included. Via "dll's" we can extend the utilities of OrcaFlex to our our requirements. An in-depth analyses capability and high level of practical and industry knowledge enables us to define clear project goals, perform high-spec analyses and advice technical solutions to ensure an optimal project performance.
Our experience ranges from conventional riser analyses to the design of innovative flexible solutions such as indicate on the next slide.

SURF Analysis Temporary Submerged Submarine hose

For the Altha/Gotha deepwater oil & gas development in highly adverse conditions a temporary crude oil offloading hose was required. The proposed a concept is to submerge the hose to approximately 100m below sea level between the shuttle tanker and the drilling rig thereby allowing the tanker to weathervane and consequently reduce weather impact on the hose.
Mocean has developed the design and analysis of the hose, hose selection, installation tools, anchors and rigging. Extensive analyses and operability studies have been performed to assess the workability and adverse weather response procedure to disconnect.